An underarm rash is often unpleasant. There might be pain, burning and itching of the affected skin, which is already tender. The rash can also be embarrassing in certain situations. It is important to diagnose the source of the rash and then proceed to treating it. Curing this condition can be done at home if you are confident as to its cause, but it should be checked out by a doctor if symptoms persist or worsen over time.
Determine the cause of the rash. You may need to see a doctor to determine if it is because of an infection or allergic reaction. In some cases the physician may give you a prescription for a topical medication.
Keep the rash area as clean as possible. Wash it gently with mild soap and dry with a soft, white towel at least twice a day.
Wear loose clothing to help keep moisture from accumulating in the area of the rash. Apply a thin layer of pure cornstarch directly on the rash to help dry it out.
Discontinue the use of antiperspirants and deodorants while you have a rash. Also, do not use any lotion or body creams in the underarm area. This will help maintain dryness and speed your recovery.
Stay in air conditioned rooms if you experience an underarm rash during warm-weather months. You will stay more comfortable and the area will stay drier.
Place a small piece soft thick white cloth under the area with the rash to keep the skin under your arm from "sticking" together. Keep the cloth in your armpit while you are sedentary. This helps relieve the discomfort of the rash by reducing friction on the affected area.